TEMPLATE      = app
HEADERS       = finddialog.h
SOURCES       = finddialog.cpp \
main.cpp

#include <QApplication>
#include "finddialog.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    FindDialog *dialog = new FindDialog;
    dialog->show();
    return app.exec();
}

#ifndef FINDDIALOG_H //estetään ,ettei otsikkotiedostoa ladata montaa kertaa
#define FINDDIALOG_H

#include <QDialog>
#include <QLabel>
#include <QCheckBox>
#include <QLineEdit>
#include <QPushButton>
#include <QHBoxLayout>

class FindDialog : public QDialog
{
    Q_OBJECT
public:
    FindDialog(QWidget *parent = 0);
signals:
    void findNext(const QString &str, Qt::CaseSensitivity cs);
    void findPrevious(const QString &str, Qt::CaseSensitivity cs);
private slots:
    void findClicked();
    void enableFindButton(const QString &text);
private:
    QLabel *label;
    QLineEdit *lineEdit;
    QCheckBox *caseCheckBox;
    QCheckBox *backwardCheckBox;
    QPushButton *findButton;
    QPushButton *closeButton;
};
#endif //define-maarittelyn loppu

#include <QtGui>
#include "finddialog.h"

FindDialog::FindDialog(QWidget *parent): QDialog(parent)
{
    label = new QLabel(tr("Find &what:"));
    lineEdit = new QLineEdit;
    label->setBuddy(lineEdit);
    caseCheckBox = new QCheckBox(tr("Match &case"));
    backwardCheckBox = new QCheckBox(tr("Search &backward"));
    findButton = new QPushButton(tr("&Find"));
    findButton->setDefault(true);
    findButton->setEnabled(false);
    closeButton = new QPushButton(tr("Close"));
    connect(lineEdit, SIGNAL(textChanged(const QString &)),
            this, SLOT(enableFindButton(const QString &)));
    connect(findButton, SIGNAL(clicked()),
            this, SLOT(findClicked()));
    connect(closeButton, SIGNAL(clicked()),
            this, SLOT(close()));
    QHBoxLayout *topLeftLayout = new QHBoxLayout;
    topLeftLayout->addWidget(label);
    topLeftLayout->addWidget(lineEdit);
    QVBoxLayout *leftLayout = new QVBoxLayout;
    leftLayout->addLayout(topLeftLayout);
    leftLayout->addWidget(caseCheckBox);
    leftLayout->addWidget(backwardCheckBox);
    QVBoxLayout *rightLayout = new QVBoxLayout;
    rightLayout->addWidget(findButton);
    rightLayout->addWidget(closeButton);
    rightLayout->addStretch();
    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addLayout(leftLayout);
    mainLayout->addLayout(rightLayout);
    setLayout(mainLayout);
    setWindowTitle(tr("Find"));
    setFixedHeight(sizeHint().height());
}

void FindDialog::findClicked()
{
    QString text = lineEdit->text();
    Qt::CaseSensitivity cs =
            caseCheckBox->isChecked() ? Qt::CaseSensitive
                                      : Qt::CaseInsensitive;
    if (backwardCheckBox->isChecked()) {
        emit findPrevious(text, cs);
    } else {
        emit findNext(text, cs);
    }
}


void FindDialog::enableFindButton(const QString &text)
{
    findButton->setEnabled(!text.isEmpty());
}

 siitä app ja ohjelmaan sisällytetään lähdekoodit SOURCES, nyt terve.cpp

p, li { white-space: pre-wrap; }

TEMPLATE      = app

HEADERS       = finddialog.h

SOURCES       = finddialog.cpp \

                main.cpp



Varsinainen ohjelma&nbsp; terve.cpp on esitetty alla olevassa "laatikossa"#include <QApplication> // Kyseessä Qt-sovellus
#include <QLabel> // Label eli ilmoitusikkuna

int main(int argc, char *argv[])
{
    QApplication app(argc, argv); //luodaan pinoon sovellus
    QLabel *label = new QLabel("Terve, eka Qt-sovellus!");
    label->show();
    return app.exec(); //täällä ollaan kunnes sovellus sulkeutuu
}


h1.